南京林业大学学报(自然科学版) ›› 2015, Vol. 39 ›› Issue (06): 81-86.doi: 10.3969/j.issn.1000-2006.2015.06.015

• 研究论文 • 上一篇    下一篇

不同林龄杉木人工林根生物量及其相容性模型

涂宏涛1,万 杰2,孙玉军1*,梅光义1,刘素真1   

  1. 1.省部共建森林培育与保护教育部重点实验室,北京林业大学林学院,北京 100083;
    2.国家林业局世界银行贷款项目管理中心,北京 100714
  • 出版日期:2015-11-30 发布日期:2015-11-30
  • 基金资助:
    收稿日期:2014-12-29 修回日期:2015-06-30
    基金项目:国家林业局“948”项目; 国家林业局重点项目(201207)
    第一作者:涂宏涛,硕士生。*通信作者:孙玉军,教授。E-mail:sunyj@bjfu.edu.cn。
    引文格式:涂宏涛,万杰,孙玉军,等. 不同林龄杉木人工林根生物量及其相容性模型[J]. 南京林业大学学报:自然科学版,2015,39(6):81-86.

Root biomass of the Chinese fir at different ages and its compatible models

TU Hongtao1, WAN Jie2, SUN Yujun1*, MEI Guangyi1, LIU Suzhen1   

  1. 1.Key Laboratory for Silviculture and Conservation,Ministry of Education, Beijing Forestry University, Beijing 100083, China;
    2.The Center of the Project Management of World Bank Loan, National Forestry Bureau, Beijing 100714, China
  • Online:2015-11-30 Published:2015-11-30

摘要: 以福建省杉木人工林为研究对象,通过固定样地法对不同林龄杉木人工林根系生物量分层调查,探究不同林龄杉木林不同土层根各组分(根兜、粗根、中根、小根、细根)生物量所占全根的比例及随着林龄的变化规律。以R软件构建根各组分最优生物量模型,并通过总量和分量两级联合控制法来建立根各组分相容性模型。结果表明:杉木林根系生物量随林龄的增大而增加,不同根系组分生物量的大小排序为根兜>粗根>中根>小根>细根,其中根兜和粗根占根系生物量的 80% 以上,人工林粗根和中根主要分布在20~80 cm土层中。利用R软件构建的非线性相容性模型能较全面、客观地反映根各组分之间生物量的分配关系(R2>0.77,P>84.7,e<0.153),同时解决根各组分模型之间的不相容,提高模型的精度。

Abstract: Based on Chinese fir plantation in Fujian Province, we studied the proportion of root biomass of each component(root stake, thick-root, medium-root, small-root, fine-root)with the forest age variation through the fixed sample plot method. We constructed the optimum biomass model of root stake, thick-root, medium-root, small-root, fine-root by using R analysis software. According to controlling the volume and component of root, we built the compatible models and evaluated the models. Results showed that root biomass of the average individual tree decreased with planting age increase. Biomasses of different root diameter classes ranked as root stake > thick-root > medium-root > small-root> fine-root. Among them root stake and thick-root accounted for more than 80% of total root biomass. So the thick root were mainly distributed in the 20-80 cm soil layer. The nonlinear compatible model could be established quickly by using R analysis software. It could completely and objectively reflect the distribution relationship of biomasses among various components(R2>0.77,P>84.7,e<0.153), solve the incompatibility among the components and improve the accuracy of the models.

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